diff --git a/pu/src/private/nc/bs/pu/m20/maintain/rule/delete/UpdatePickmRule.java b/pu/src/private/nc/bs/pu/m20/maintain/rule/delete/UpdatePickmRule.java
index 7dbc80c0..4cf994cb 100644
--- a/pu/src/private/nc/bs/pu/m20/maintain/rule/delete/UpdatePickmRule.java
+++ b/pu/src/private/nc/bs/pu/m20/maintain/rule/delete/UpdatePickmRule.java
@@ -110,7 +110,7 @@ public class UpdatePickmRule implements IRule<PraybillVO> {
                 continue;
             }
 
-            String sql = " update  mm_pickm_b set vbdef16 =  TO_CHAR(TO_NUMBER(vbdef16) -TO_NUMBER('"+((UFDouble)updateMap.get("num")).toString()+"'))  where mm_pickm_b.cpickm_bid ='" + updateMap.get("pk") + "'";
+            String sql = " update  mm_pickm_b set vbdef16 =  TO_CHAR(TO_NUMBER(CASE WHEN vbdef16 IS NULL OR vbdef16 = '~' OR vbdef16 = '~' THEN '0'  ELSE vbdef16 END) -TO_NUMBER('"+((UFDouble)updateMap.get("num")).toString()+"'))  where mm_pickm_b.cpickm_bid ='" + updateMap.get("pk") + "'";
 
             dao.executeUpdate(sql);
         }